New York and Long Island Coignet Stone Company Building

The New York and Long Island Coignet Stone Company Building is an office structure in Gowanus, Brooklyn, featuring a cast-stone facade with urns, ionic columns, and porticos. It stands at the intersection of Third Street and Third Avenue, displaying construction methods that were innovative for its time.

Built in 1873 as a display model for Beton Coignet technology, this structure stands as the oldest concrete building in New York City. Its construction method became influential, affecting later major building projects in the city.

The structure displays its cast-stone facade with urns and ionic columns, demonstrating how the company wanted to showcase the material's possibilities to potential customers and architects. These visible details reflect the era's excitement about new building materials and their decorative potential.

The building is located at Third Street and Third Avenue in Gowanus and is easily accessible by the F train, which stops at Carroll Street station. It sits next to Whole Foods Market, making it simple to find when exploring the neighborhood.

This structure served simultaneously as an office and showroom where architects and builders could see and understand the new concrete techniques firsthand. This dual purpose helped spread a revolutionary construction method that later shaped many major projects.

Location: Brooklyn

Inception: 1870s

Address: 360–370 Third Avenue

GPS coordinates: 40.67500,-73.98833

Latest update: December 8, 2025 21:03